diff --git a/libs/pigment/colorspaces/KoAlphaColorSpace.cpp b/libs/pigment/colorspaces/KoAlphaColorSpace.cpp
index b5ea058801c058f0532395357555e3956083ab3e..6ec2aa1c82a0159b7cd81c9f16123287a2206aa2 100644
--- a/libs/pigment/colorspaces/KoAlphaColorSpace.cpp
+++ b/libs/pigment/colorspaces/KoAlphaColorSpace.cpp
@@ -194,7 +194,8 @@ namespace {
                                 }
                                 mask++;
                             }
-                            memset(d, OPACITY_TRANSPARENT, linesize);
+                            // linesize is uninitialized here, so it just crashes
+                            //memset(d, OPACITY_TRANSPARENT, linesize);
                         }
                         dst += dststride;
                         src += srcstride;